A serious logic question that I would like to be answered.  Why is it that Christians follow, and want others to follow, some laws in the Bible, while they ignore other laws?

Deuteronomy 22:13-21

¹³If any man take a wife, and go in unto her, and hate her,

   ¹⁴And give occasions of speech against her, and bring up an evil name upon her, and say, I took this woman, and when I came to her, I found her not a maid:

   ¹⁵Then shall the father of the damsel, and her mother, take and bring forth the tokens of the damsel's virginity unto the elders of the city in the gate:

   ¹⁶And the damsel's father shall say unto the elders, I gave my daughter unto this man to wife, and he hateth her;

   ¹⁷And, lo, he hath given occasions of speech against her, saying, I found not thy daughter a maid; and yet these are the tokens of my daughter's virginity. And they shall spread the cloth before the elders of the city.

   ¹⁸And the elders of that city shall take that man and chastise him;

   ¹⁹And they shall amerce him in an hundred shekels of silver, and give them unto the father of the damsel, because he hath brought up an evil name upon a virgin of Israel: and she shall be his wife; he may not put her away all his days.

   ²⁰But if this thing be true, and the tokens of virginity be not found for the damsel:

   ²¹Then they shall bring out the damsel to the door of her father's house, and the men of her city shall stone her with stones that she die: because she hath wrought folly in Israel, to play the whore in her father's house: so shalt thou put evil away from among you.

http://bibleresources.bible.com/passagesearchresults.php?passage1=deuteronomy+22%3A13-21&version1=9

Deuteronomy is the old testament.

Jesus' doctrine superscedes all past things.

Besides which i'm pretty sure that was just written by some guy who wanted to reform Judiasm to be more compliant to his countries views.

That's not true exactly.  Jesus' doctrine requires believers to maintain a different relationship to the law than Judaism does, but it does not automatically supercede that law, and in many case actually holds people to a higher standard than the law.

There are laws which it does plainly supercede though, such as whether or not doing certain things on the Sabbath is a sin or whether or not eating certain types of food is a sin.

There would be a lot less teen pregnancies under that law... (jk jk)

Aren't the Ten Commandments in the Old Testament?  I've always thought of them as being 'top' laws for the Bible.

You are mistaking laws for punishments for breaking said "laws".

You are kind of running Judaism and Christianity together.  You are totally right that the Ten Commandments are important in both of these religions, but Christianity really has some overarching laws that supercede everything else.

Really the "law" in Christianity that encompasses most every other law (not all of them but most) is to simply love everyone in the world around you and treat them in a way a person who loved them would.  However simple this standard sounds, it is really more difficult to acheive than just about anything in the Old Testament.  Its pretty much an unacheivable standard that humans can never meet, but one they should aspire towards because it is the only way to acheive a Christ-like ethos in a tangible form.

And that love can encompass a lot of things, including anger towards some people as an expression of how they are failing to live up to a Christian standard.  This is generally only applicable in the case of other Christians, as the New Testament, particularly in Paul's letters, tells Christians to not focus on those who are outside the Church as it is not a Christian's job to judge their standard of living since they are not trying to live by a Christian standard as long as they are also not trying to persecute Christians. 

But anyone who claims to invoke righteous anger is invoking the law, and when a Christian chooses to invoke the law on others rather than forgive those who have transgressed the law, they are subjecting themselves to harsher judgement rather than forgiveness.  Those who forgive others are forgiven themselves.

Christ proclaimed that he came to fulfill the Judaic law while simultaneously moving beyond it.  But this does not mean that the Judaic law was simply abandoned.  Paul aptly sums it up when he tells people that they should follow the spirit of the law rather than the letter of the law.  Its kind of the difference between someone who is a petty person who never breaks any laws but never helps anyone else out either versus a generous person who sometimes breaks the law because it will help other people.

Judaism and Christianity share a rich history, but they are definitely distinct in many, many ways, even when it comes down to how they approach the Bible.